Padlock



Sept. 10, 1946. H. B. DUTToN PADLOGK Filed May 27, 1943 Ullfaululww Z.

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ATT'U R N EYE Patented Sept. 10,E 1946 UNITED STATES PATENT OFFICE Y PADLOCK Y Howard B. Dutton, Des Moines, Iowa Application May 27, 1943,V Serial No. 488,717

I 3 Claims.

My invention relates to locks and has among its objects and advantagesthe provision of an improved padlock. 1

In the accompanying drawing:

Figure 1 is a perspective view illustrating the padlock in association with a hasp.

Figure 2 is a vertical sectional view.

Figure 3 is an edge View.

Figure 4 is a face View with the shackle unlatched.

Figure 5 is a sectional viey along the line 5-5 of Figure 2.

Figure 6 is a top end view, and

Figure 7 is a bottom end view.

In the embodiment of the invention selected for illustration, I make use of a lock case' I0 having a key actuated cylinder I2 incorporated therein. The key actuated rotary element I4 of the cylinder is provided with an eccentrically positioned cam pin I6 engageable with a right angular flange I8 on a bolt 2D slidably mounted in a chamber 22 in the lock case I9.

n This lock case is'provided with an opening 24 for slidably receiving a pin 26 of a shackle structure 23. This pin is preferably rectangular in cross section and provided with rounded corners. In one side face of the pin 26 and adjacent its inner end is provided a notch 30 for the reception of the tapered end 32 of the bolt 20. While the end 32 is tapered, one side of the bolt is characterized by a flat face engageable with the correspondingly shaped face of the notch 30 so as to effectively hold the pin 26 against outward movement. However, the Vangular face 34 on the bolt 2U coacts with the pin 26 to retract the bolt 20 When the pin is pressed home in the opening 24.

One end of a compression spring 34 has one end supported in a depression 36 communicating with the chamber 22 and its other end mounted on a pin 38 on the bolt 20 to be restrained from lateral displacement. Thus the bolt 20 is yieldingly urged against the pin 26to cause the tapered end 32 to enter the notch36 when brought into alignment therewith. Since the cam pin I6 is eccentrically positioned with respect to the axis of rotation of the element I4 rotation of this element brings the cam pin into engagement with the lip i8 for retracting the bolt 20.

To the outer end of the pin 26 is attached a shoulder or body 40 to which is connected one end of an L-shaped guide 42 haiung its leg 44 slidably guided in a bore 46 Yin the lock case l0. This leg is provided with an axial bore 48 for the reception of a compression spring 50 engaging the bottom face 52 of the bore 46. =A circumferential groove 54 is provided about the inneren@ of the leg 44. A catch 56 is slidably mounted in a bore 58 in the key case I6 and communicating with the bore 46. Between the catch 56 and the bottom face of the bore 58 is interposed a compression spring 60 to yieldingly urge the catch against the leg 44.

The pin 26, the shoulder 40 and the guide 42 are of sturdy construction and connected as a unit. Figure 1 illustrates the eye element 62 of a hasp 64 as being mounted on the pin 26. The pin 26 is of considerably larger cross sectional proportions than the guide 42. When the padlock is used in conjunction with an eye element 62 iitting the pin 26, the padlock cannot be removed from the hasp without sawing through or breaking the pin 26, the shoulder 40 or the lock case. This case is of sturdy construction and the shoulder 40 and the pin 26 are also of massive design so as to render the parts relatively difficult to saw. Sawing, breaking, or otherwise destroying the guide 42 does not effect unlocking of the padlock or its release from the hasp, since the shoulder 46 holds the pin 26 in connected relationship with the eye element.

In padlocks employing conventional shackles, severing of the shackle at any point releases the padlock from the hasp. This not true in the instant case, and the vital parts are relatively strong and heavy so as to greatly increase the difculty of cutting through the parts.

When the bolt 20 is retracted through manipulation of the key, the spring 5D propels the shackle structure to its unlocked position of Figure 4, at which time the catch 56 engages in the groove 54 to prevent the guide 42 from being propelled from the key case.

Without further elaboration, the foregoing will so fully explain my invention, that others may, by applying current knowledge, readily adapt the same for use under various conditions of service.

I claim:

1. A padlock for use with hasps, comprising a casing having a rotatable key cylinder therein with an eccentric cam pin, thecasing having first and second openings toV either side of the cylinder, the first opening having a larger diameter than said second opening, a chamber above the cylinder to receive the cam pin and communicating with the first opening, a heavy pin having a substantially rectangular cross-sectional contour in said first opening and formed with a notch, a circular shoulder on the pin, a bolt engaging the notch and retractible by the cam pin upon turning of the cylinder by a key, a guide having a portion secured at right angles to the shoulder and a part depending from said portion and substantially parallel with the pin and receivable in the second opening in the casing for limited sliding movement, means for limiting the sliding movement, and means for sliding the guide to release the pin when the bolt is disengaged from the notch.

2. A padlock for hasps comprising a casing having a rst opening and a second opening, the iirst opening being of greater diameter than said second opening, a pin having a substantially rectangular cross sectional contour, slidable in said rst opening and receivable in the eye element of the hasn, a circular shoulder at the outer end of said pin adapted to engage the eye elementof the hasp, a guide having a vertical portion and a laterally extending portion, said laterally ex-Y` 3. In a padlock, the combination of a case having rst and second openings, the diameter of the nrst opening being greater in cross section than the diameter of said second opening, a shackle comprising a heavy pin slidable in said rst opening and having a circular shoulder at its outer end adapted t0 engage an eye element of a hasp, a guide having a straight portion and a laterally extending portion at right angles to said straight portion, said laterally extending portion secured to said circular shoulder and said straight portion slidable in said second opening, a spring in said second opening adapted to be received internally of the straight portion of the guide to act on said guide to propel the shackle toan unlatching position, a spring stop carried by said case and engaging the straight portion of said guide to hold the latter in said second opening, said pin having a notch, a spring pressed bolt inside a recess formed in said case engageable in said notch to restrain the pin from withdrawal and a key actuated means acting on said bolt to retract the latter from latching engagement with said pin. l Y

HOWARD B. DUTTON. 

